Carbureter.



PATENTED JAN. 3, 1905.

F. L. MERRITT. CARBURETEB.

APPLIOATION FILED NOV. 9, 1904.

2 SHEETS-SHEET 1.

5 W 7 wwh No. 778,988. PATENTED JAN. 3, 1905.

F. L. MERRITT.

' OARBURETER.

APPLICATION FILED NOV. 8, 190}.

2 SHEETS-SHEET 2.

' municates with a passage (2, the outlet from Patented January 3, 1905.

PATENT OFFICE.

FRANCIS LANE MERRITT, OF SHEPHERDS BUSH, ENGLAND.

CARBURETEFt.

SPECIFICATION forming part of Letters Patent No. 778,988, dated January 3, 1905.

Application filed November 8, 1904-. Serial No. 231,866.

To all whom it may concern:

Be it known that I, FRANCIS LANE MERRITT, a subject of the King of Great Britain and Ireland, residing in Shepherds Bush, in the county of Middlesex, England, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

This invention relates to means for supplying internal-combustion engines with one or other of two kinds of combustible vapor, and relates more particularly to the carbureter by which this is rendered possible.

It has for its object to start the engine of a motor-car, for example, with petrol or other volatile liquid and thenwhen the engine and carburetor are hot to drive with some less volatile and less expensive liquid, such as paraffin.

In order that my invention may be fully understood, I will describe it with reference to the accompanying drawings.

Figure 1 is a vertical section of a carbureter constructed according to this invention. Fig. 2 is a plan of the same.

A is the carbureter, divided into two chambers a a. V

6 is a valve separating the chamber a from the chamber a.

0 represents arms which guide the stem 6 of the valve. Z2 and also support the wiregauze c. A rod 5 provided with an obturating-needle b and a spraying-cone 6 passes through a passage formed in the valve-stem Z2.

6" is a spring keeping the valves 5 and 6 up to their seats.

d is a passage for the inlet of fuel. It comwhich is regulated by needle-valves CF. The passage d is in communication with two pipes (Z cl, one of which leads to a tank filled with a volatile hydrocarbon, such as petrol, and the other to a tank filled with a heavy hydrocarbon, such as parafiin.

(Z is a two-way cock which puts the passage (Z' into communication with one or other of the pipes d (Z 9 is an air-controlling valve moved by the handle 9, and e is a cone directing the air onto the sprayingcone b.

The lower chamber a is provided with a 1 jacket f, heated by the exhaust-gases. An auxiliary valve is provided for the inlet of air, (not shown,) which isarranged beyond the throttle-valve p.

it is a disk of wire-gauze, and i is a drainagepipe, the orifice of which is closed by a porous pad i.

j is a passage leading to the engine, and Z6 is the exhaust-pipe.

The workingof the carbureter is as follows: The cock (Z is for starting the engine, put into communication with the petrol-pipe (Z the air-valve'g opened. The valves 1) and b are opened by the suction of the engine-piston and petrol is sucked into the carbureter. When the engine is sufficiently hot, the cock (Z is put into communication with the paraffin-pipe d, the needle-valve therefor being adjusted, if necessary. The extent to which the valves 7) and b are opened, and therefore the amount of fuel sucked in at each stroke,

can be adjusted by opening or closing the valve 9 to a greater or less extent. The drainage-pipe and the porous pad t" prevent drops of paraffin collecting at the bottom of the carbureter, and therefore very effectually prevent all objectionable odor.

A means may be provided for operating the oil-admission valve to chambena from the exterior of said chamber in case the valve should stick to its seating.

Having now particularly described and ascertained the natureof my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a carbureter, the combination with a chamber having a valve-controlled air-inlet, an oil-admission inlet communicating with said chamber, a cone-shaped valve controlling the admission of oil into said chamber, and a deflector located in said chamber and surrounding said valve with its upper end open and terminating in a depending cone and effective to deflect the incoming air so as to assist in the atomizing of the oil.

2. In a carbureter, the combination with a pair of chambers, one having a valve-controlled air-inlet, and also an oil-admission conduit, a pair of cone-shaped valves, one controlling the admission of oil through said inlet and the other controlling the admission of air and oil to the other chamber and operative together, the air-inlet opening into said chamber at the side of said first valve, and a defiector located in said chamber in which the oil and air are first admitted and entirely surrounding said valve for deflecting the air to a point above the cone-shaped valve controlling the admission of oil into the chamber.

3. In a carbureter, the combination with a pair of chambers, one of said chambers having an oil-inlet and an air-inlet, a pair of coneshaped valves operative simultaneously, one to control the admission of oil into one of said chambers and the other the admission of oil and air into the other chamber, and a screen located between said valves and through which the mixed air and oil passes before its admission into said last-mentioned chamber.

4. In a carbureter, the combination with a pair of chambers, one of said chambers'having an oil-inlet and an air-inlet, a pair of coneshaped valves operative simultaneously, one to control the admission of oil into one of said chambers and the other theadmission of oil and air into the other chamber, a screen located between said valves and through which the mixed air and oil passes before its admission into said last-mentioned chamber, and a screen below said last-named valve.

5. In a carbureter, the combination with a pair of chambers, one of said chambers having an oil-inlet and an air-inlet, a pair of coneshaped valves operative simultaneously, one to control the admission of oil into one of said chambers and the other the admission of oil and air into the other chamber, a screen located between said valves and through which the mixed air and oil passes before its admission into said. lastmentioned chamber, and means located in that chamber having the oil and air inlets for deflecting the air to a point above the cone-shaped valve controlling the admission of oil.

6. In a carbureter, the combination with a pair of valve-controlled chambers, one having an air-inlet and an oil-inlet and the other of said chambers having communication with said first chamber and having a drainage, the orifice of which is closed by a porous pad.

7 In a carbureter, the combination with a pair of chambers in communication, one having a valve controlled air inlet and an oilinlet and having its wall perforated entirely around such chamber, a pair of separated.

simultaneously-operative cone-shaped valves, one controlling the oil-inlet and the other the communication between the chambers, a jacket surrounding said last-mentioned chamber and heated by the exhaust-gases, a pair of oil-supplies to the oil-inlet, means for reg ulating such supplies and a single means for controlling the admission of oil from. either of said supplies.

' 8. In a carbureter, the combination with a pair of communicating chambers, one having an oil-inlet and an air-inlet, means for regulating the admission of different kinds of fluid into said last-mentioned chamber, means for admitting either of such fluids into said oil-inlet, an oil-supply-controlling valve constructed to spray the oil, said air-inlet opening into said chamber at the side of said valve, a valve controlling the communication between the two chambers, said valves being simultaneously operative, means entirely surrounding said first valve for deflecting the air in the chamber having the air-inlet to a point above the oil-admission valve thereby to assist in the atomizing of the oil, a jacket located around that chamber into which the oil and air are admitted only when mixed, and means for preventing drops of fluid from collecting at the bottom of the carbureter,

9. In a carbureter, the combination with a pair of chambers, one having its wall perforated for the admission of air entirely around such chamber and also having an oil-inlet, a valve for controlling the admission of air to such chamber, a pair of cone-shaped valves, one controlling the admission of oil through such oil-inlet and the other controlling the admission of air and oil to the other chamber and operative together, and a deflector located in said chamber in which the oil is first admitted and entirely surrounding said oiladmission valve for deflecting the air to apoint above the cone-shaped oil-admission valve.

Signed at 19 Holborn Viaduct, London, England, this 27th day of October, 1904:.

FRANCIS LANE MERRITT. Witnesses:

JOHN ILJAOK, R. B. WADE. 

